Current outcome
Bithumb's internal Daou Office mobile system was breached by an unauthorized external party, with confirmed exposure limited to 6,444 users (844 readable) and 715 employee/partner records; exchange accounts, assets and trading systems were not compromised, access was blocked, the system was disabled, and the incident was reported to Korean authorities.
Progress timeline
2 material updates- #01
South Korea’s Second-Largest Crypto Exchange Bithumb Confirms Security Breach
Bithumb confirmed that an unauthorized external party breached its internal mobile groupware system and leaked personal data, an incident discovered on October 27 that is now under investigation alongside cyber intrusions at Mirae Asset Global Investments and Daishin Securities, the latter exposing data on 38,490 customers, with South Korea's Financial Supervisory Service reviewing all three cases.
Source evidence: wublockchainenglish · foresightnews · theblockbeats · Cointelegraph · foresightnews · Decrypt · Protos
- #02
Bithumb更新黑客事件后续：共有6444名用户信息被盗，大部分用户信息无法读取
Bithumb quantified the exposure: 6,444 users' data affected (5,600 encrypted/unreadable, 844 readable) plus 715 employee/partner records including names, phone numbers, emails, resident registration numbers, driver's license numbers and bank account numbers; the company reported the incident to KISA and the Personal Information Protection Commission and tightened real-time monitoring of abnormal transactions and withdrawals.
State after update: Bithumb's internal Daou Office mobile system was breached by an unauthorized external party, with confirmed exposure limited to 6,444 users (844 readable) and 715 employee/partner records; exchange accounts, assets and trading systems were not compromised, access was blocked, the system was disabled, and the incident was reported to Korean authorities.
Source evidence: theblockbeats · foresightnews